Focus on your employees behavior, not your perception of someone's attitude (the most difficult of the 4 Keys).

Always encourage the participation of those you lead and others around you. Heaven forbid that they may have a better answer or solution than you do. Those participating are those that are engaged. Put your ego aside.

"Shut Up" and "Actively Listen" to what others may have to say. Looking at your PC, multitasking, texting, and thinking about other issues are a sure way to disengage someone. Think about how you feel when it's done to you.

Most management books, although they may have some great ideas, primarily discuss techniques to achieve the above 4 Keys.